The lichen specimens belonging to the order Lecanorales were collected from calcareous rocks in various areas of Mashhad. (Khorasan province). Specimens were taken back to the laboratory and identified. The identification of the species is based on morphology, anatomy and chemistry. They compose of  8  taxa  belonging  to 7 genera, namely, Lecanora conferta, L. muralis, Rhizocarpon umbilicatum,...